You are informed that all the users within the network are unable to access the internet. you decide to start troubleshooting from the physical layer of the osi model. which of the following approaches would you use to troubleshoot this problem?
random layer approach
divide and conquer approach
bottom up approach
top down approach

Consider a slotted aloha system, where the time slot equals the fixed duration of each packet. assume that there are 4 stations a,b,c,d sharing the medium. (a) stations a,b,c,d receive one packet each from higher layers at times 1.3, 1.5, 2.6,5.7 respectively. show which transmissions take place when, according to the slottedaloha protocol; describe all transmissions until all four packets have been successful.when needed, each station has access to the following sequence of random number, provided by a random number generator and drawn uniformly between 0 and 1: (1) station a draws numbers: 0.31, 0.27, 0.78, 0.9, 0.9, 0.11, 0. (2) station b draws numbers: 0.45, 0.28, 0.11, 0.83, 0.37, 0.22, 0. (3)station c draws numbers: 0.1, 0.2, 0.3, 0.4, 0. (4) station d draws numbers: 0.36, 0.77, 0.9, 0.1, 0.1, 0.1, 0.1, 0. (b) in slotted aloha, a station transmits in each time slot with a given probability. what probabilities would you assign to each of the four stations so as to: (i) maximize the efficiency of the protocol? (ii) maximize fairness among the four stations? (c) will the efficiency increase or decrease if we modify slotted aloha as follows: (i) get rid of slots and allow stations to transmit immediately? (ii) implement carrier sensing? (iii) implement collision detection? (iv) implement collision avoidance?

Arah has entered data about football players from team a and team b in a worksheet. she enters names of players from team a with details about each player in different columns of the worksheet. similarly, she enters details of all the players from team b. which option will her view the data for team a and team b in two separate sections after printing? a. page break view b. freeze pane view c. split screen view d. full screen view e. zoom out view

If you want to delete an entire word at a time, which key should you press along with the backspace or delete key?